<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<script src="https://cdn.jsdelivr.net/npm/vue@2"></script>
<body>
    <div id="app">
        <input v-model="message">
        <button @click="getData">修改</button>
        <p>{{message}}</p>
    </div>
    <script>
        var app=new Vue({
            el:'#app',
            data:{
                message:''
            },
            methods:{
                getData:function(){
                    this.message="修改"
                }
            }
        })
    </script>
</body>
</html>